a = [1,3,5,7,8,10,12]
b = [4,6,9,11]
j=0
for i in a:
    for k in range(31):
        if i == int((k+1)/10 + (k+1)%10):
            j += 1
for i in b:
    for k in range(30):
        if i == int((k+1)/10 + (k+1)%10):
            j += 1
for k in range(28):
    if 2 == int((k+1)/10 + (k+1)%10):
        j += 1            
print(j)